CN113290772A

CN113290772A - Automatic change injection molding machine

Info

Publication number: CN113290772A
Application number: CN202110367473.5A
Authority: CN
Inventors: 徐佐周; 郑明龙
Original assignee: Hangzhou Lebelung Machinery Manufacturing Co ltd
Current assignee: Hangzhou Jiarunhong Machinery Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-08-24
Anticipated expiration: 2041-04-06
Also published as: CN113290772B

Abstract

The invention discloses an automatic injection molding machine. The injection molding machine comprises a frame, be equipped with mould seat and injection seat in the frame, be equipped with cover half and movable mould on the mould seat, be equipped with mould profile one and model face two on cover half and the movable mould respectively, mould profile two comprises centre form profile and external mold profile, install movable kicking block on the movable mould, centre form profile is located movable kicking block surface, external mold profile is located the movable mould surface, be equipped with the air discharge duct in the activity kicking block, the air discharge duct is located centre form profile and internally mounted has notch pull throughs, install spiral push rod and pivot in the injection seat, spiral push rod tail end is equipped with the push rod spout, the pivot is arranged in the push rod spout and with push rod spout swing joint, install the locking device between pivot and push rod spout, sliding connection has the carousel in the pivot, be equipped with the external screw thread on the carousel, be equipped with the interior thread zone in the injection seat. The invention has the beneficial effects that: the work continuity is improved, the product forming quality is guaranteed, and the injection molding efficiency is improved.

Description

Automatic change injection molding machine

Technical Field

The invention relates to the technical field of injection molding machines, in particular to an automatic injection molding machine.

Background

After the completion of moulding plastics, the mould unloading is got a in-process, needs to take out the injection molding, and what traditional mode of getting adopted is that the manual work is got the piece, and this kind of mode of getting is wasted time and energy, and work continuity is poor, and is inefficient. In order to improve the demolding efficiency, the existing injection molding machine is usually provided with a movable ejector block capable of automatically ejecting on a mold.

For some injection molding products with special structures, when the mold of the product is designed, a part of the model surface of the product needs to be designed on the surface of the top block so as to meet the molding requirement of the product. If the end position of the melt flow is positioned on the top block, an exhaust groove needs to be formed in the top block for exhausting so as to ensure the molding quality of an injection molding product, a good solution is not provided for cleaning the exhaust groove, and a large amount of residues are left in the groove opening of the exhaust groove in the past to cause the blockage of the exhaust groove, so that the gas is difficult to exhaust.

In addition, the spiral propelling rod on the injection molding machine needs to rotate and linearly propel in the working process, the conventional injection molding machine drives the spiral propelling rod to rotate and linearly propel by installing a rotary power device and an injection oil cylinder at the tail part of the spiral propelling rod respectively, and the structure of the injection molding machine is excessively complicated and tedious, the working continuity is poor, and the efficiency is low.

Disclosure of Invention

The invention provides an automatic injection molding machine which can clean the notch of an exhaust groove, has good working continuity and high efficiency, and aims to overcome the defects of difficulty in cleaning the notch of the exhaust groove, poor working continuity and low efficiency in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic injection molding machine, includes the frame, be equipped with mould seat and injection seat in the frame, the mould seat is fixed in the frame, install cover half and movable mould on the mould seat, cover half and mould seat fixed connection, the movable mould is arranged in the side of cover half and with mould seat sliding connection, the surface of cover half and the surface of movable mould are equipped with mould profile one and model surface two respectively, mould profile one and mould profile two all are located the side that the cover half is relative with the movable mould, mould profile two comprises centre form profile and outer mould profile two parts, be equipped with the recess on the movable mould, sliding connection has movable kicking block in the recess, the centre form profile is located the surface of movable kicking block, the outer mould profile is arranged in the surface of movable mould and is located the outside of centre form profile, the inside of activity kicking block is equipped with the air discharge duct, the opening part of air discharge duct is located the centre form profile, the exhaust duct is communicated with the external space, a notch dredging device is arranged inside the exhaust duct, the injection seat is arranged on the frame and is in sliding connection with the frame, the fixed mold is positioned between the injection seat and the movable mold, a first injection seat cavity and a second injection seat cavity are arranged inside the injection seat, the first injection seat cavity is positioned between the fixed mold and the second injection seat cavity, a spiral pushing rod is arranged in the first injection seat cavity, the tail end of the spiral pushing rod penetrates through the first injection seat cavity and is arranged in the second injection seat cavity, a rotating shaft is arranged in the second injection seat cavity, a pushing rod sliding groove matched with the rotating shaft is arranged on the end face of the tail end of the spiral pushing rod, one end of the rotating shaft is arranged in the pushing rod sliding groove and is movably connected with the pushing rod sliding groove, a locking device is arranged on the rotating shaft and is positioned inside the pushing rod sliding groove, the other end of pivot is installed on the lateral wall of injection seat cavity two and is connected rather than rotating, sliding connection has the carousel in the pivot, be equipped with the external screw thread on the lateral surface of carousel, be equipped with on the inside wall of injection seat cavity two with external screw thread assorted internal thread district, the carousel passes through the cooperation and two threaded connection of injection seat cavity in external screw thread and internal thread district.

When the spiral pushing rod carries out rotary feeding, the rotating shaft is connected with the spiral pushing rod under the action of the locking device, the spiral pushing rod is driven to synchronously rotate by controlling the rotating shaft to rotate forwards, so that the molten material is conveyed forwards, the spiral pushing rod retreats under the thrust action of the molten material, and meanwhile, the rotary disc also retreats on the rotating shaft under the action of the threads; when the spiral pushing rod injects and pushes the material into the cavity, the locking device is controlled to release the connection state of the rotating shaft and the spiral pushing rod, the rotating shaft is controlled to rotate reversely, the rotating disc moves forwards under the action of the threads and pushes the spiral pushing rod to drive the spiral pushing rod to move forwards together, and the molten material is injected into the cavity. After the die is closed, a cavity between the movable die and the fixed die consists of a second model surface (an inner model surface and an outer model surface) and a first model surface, when an injection molding product is demoulded, the injection molding product can be automatically ejected out by controlling the movable ejector block to move in the groove, and the demoulding efficiency of the injection molding machine is improved by the design, so that the working continuity is further improved. In addition, in the demolding process, the notch of the exhaust groove is automatically cleaned and dredged through the notch dredging device, so that the blockage phenomenon at the notch of the exhaust groove can be prevented, the molding quality of an injection molding product is ensured, and the injection molding efficiency is improved.

Preferably, be equipped with the fixed plate in the frame, the fixed plate is arranged in between mould seat and the injection seat, through a plurality of guide arm fixed connection between fixed plate and the mould seat, be equipped with on the movable mould with fixed guide arm assorted guiding hole, the movable mould passes through the guiding hole and installs on fixed guide arm, install the cylinder on the mould seat, the movable mould is fixed on the cylinder and through cylinder and fixed guide arm sliding connection, the cover half is fixed on the fixed plate just is the one side of mould seat. Through the design of fixed guide arm and guiding hole, played direction and spacing effect to the motion of movable mould for the cover half, wherein the cylinder is used for driving the movable mould and makes a round trip to slide on the guide arm, realizes the die sinking and compound die with the cover half.

Preferably, the bottom surface of the groove is provided with a groove through hole, the groove through hole is internally and slidably connected with a sliding column matched with the groove through hole, one end of the sliding column is fixedly connected with the movable ejector block, the other end of the sliding column is arranged outside the movable die, and the die seat is fixedly provided with a fixed ejector block corresponding to the sliding column in position. In the mold opening process, the movable mold is separated from the fixed mold under the control of the air cylinder, the fixed ejector block abuts against the sliding column and the movable ejector block on the sliding column, the injection molding product can be automatically ejected out of the groove, the action is rapid, the reaction is sensitive, the demolding efficiency of the injection molding machine is improved, and the working continuity is further improved.

Preferably, a first side sliding groove is formed in the inner side wall of the groove through hole, a first side sliding block matched with the first side sliding groove is fixed on the sliding column, the first side sliding block is arranged in the first side sliding groove and is in sliding connection with the first side sliding groove, a first return spring is arranged in the first side sliding groove, one end of the first return spring is fixed to the first side sliding block, and the other end of the first return spring is fixed to the end portion of the first side sliding groove. After the last injection molding product automatic demoulding is finished, when the mould is closed next time, the first reset spring can play the reset role of the sliding column and the movable ejector block.

As preferred, be equipped with the draw-in groove on the terminal surface of sliding column one end, be equipped with on the activity kicking block with draw-in groove assorted buckle, the sliding column passes through the cooperation and the sealed joint of activity kicking block of draw-in groove and buckle, the inside of activity kicking block is equipped with exhaust passage one, the one end of exhaust passage one is located the lateral wall of exhaust duct, the other end of exhaust passage one is located the terminal surface of buckle, the inside of sliding column is equipped with exhaust passage two, the one end of exhaust passage two is located the cell wall of draw-in groove and is linked together with exhaust passage one, the other end of exhaust passage two is located the lateral wall of sliding column and arranges the outside of movable mould in. The clamping mode is simple and convenient, the installation is easy, and the stability is good. The gas in the middle-sized cavity can be discharged to the external space through the exhaust groove, the first exhaust channel and the second exhaust channel in sequence, so that the molding quality of injection molding products is ensured.

As preferred, be equipped with the air discharge duct through-hole on the bottom surface of air discharge duct, notch pull throughs is including arranging the inside fixed pipe of air discharge duct through-hole in, fixed pipe fix on the bottom surface of recess and with air discharge duct through-hole sliding connection, the inside sliding connection of air discharge duct has the mediation piece, be fixed with the inside assorted slide bar with fixed pipe on the mediation piece, the slide bar is arranged fixed intraduct in and with fixed pipe sliding connection, be equipped with positioning groove on the inside wall of fixed pipe, be fixed with on the slide bar with positioning groove assorted positioning groove block. Under the natural state, the dredging block is positioned below an opening of the exhaust channel to ensure the fluency of exhaust. In the process of ejecting the injection molding product by the movable ejector block, the slide rod slides in the fixed tube and is pulled out of the fixed tube, when the movable ejector block just ejects the injection molding product out of the groove, the positioning fixture block on the slide rod is also just clamped into the positioning fixture groove on the inner side wall of the fixed tube, and at the moment, the fixed tube and the slide rod are in a relatively fixed state. Later, at the in-process that the activity kicking block resets, because the slide bar is blocked motionlessly, so the mediation piece on it is in fixed state, the relative mediation piece of exhaust duct moves this moment, and when the notch of exhaust duct moved the position of mediation piece, the residue of notch edge can be ejecting by the mediation piece, reaches the purpose that prevents the notch jam, has guaranteed the shaping quality of injection molding product.

As preferred, be equipped with side spout two on the lateral wall of air discharge duct, be fixed with on the mediation piece with side spout two assorted side slider two, side slider two is arranged in side spout two and with side spout two sliding connection, the mediation piece is close to the tip of air discharge duct opening one end and is greater than side spout two and is close to the tip of air discharge duct opening one end to the distance of air discharge duct opening part, the inside of fixed pipe is equipped with reset spring two, the one end of reset spring two is fixed on the bottom surface of recess, the tip of the fixed slide bar of the other end of reset spring two. In the process of resetting the movable ejector block, the second side sliding groove moves relative to the second side sliding block, when the end wall of the second side sliding groove touches the second side sliding block, pressure can be provided for the second side sliding block, the positioning clamping block on the sliding rod can be separated from the positioning clamping groove on the fixed pipe under the action of the pressure, the relative fixed state of the sliding rod and the fixed pipe is released, and then the sliding rod completes automatic resetting under the action of the second reset spring to ensure the working continuity of the injection molding machine.

Preferably, a feeding channel is arranged in the fixed die, one end of the feeding channel is positioned on the first die surface, the other end of the feeding channel is positioned on the contact surface of the fixed die and the fixed plate, and an injection port matched with the other end of the feeding channel is arranged on the fixed plate. Wherein the injection port functions as a positioning of the injection seat to accurately inject the melt into the feed channel and along the feed channel into the mold cavity.

Preferably, the injection seat is provided with an injection head matched with the injection port in position, the injection head is communicated with the first injection seat cavity, the side wall of the first injection seat cavity is provided with a feed port, a feed cylinder is fixed at the feed port, a first sealing ring is arranged at the joint of the feed cylinder and the feed port, the feed cylinder is communicated with the first injection seat cavity, the injection seat is provided with a heating layer, the heating layer is sleeved outside the first injection seat cavity, and the heating layer is positioned between the feed port and the injection head. During injection molding, a worker can continuously add raw materials into the material barrel to ensure the supply of the raw materials in the first injection seat cavity. The raw materials are heated and melted by the heating layer in the first cavity of the injection seat, and then are injected into the feeding channel through the injection head under the propelling action of the spiral propelling rod. The first sealing ring is arranged at the joint of the charging barrel and the feeding hole, so that the sealing performance of the first injection seat cavity is improved, and the condition of liquid leakage and air leakage is prevented.

Preferably, a connecting through hole matched with the spiral pushing rod is formed between the injection seat cavity I and the injection seat cavity II, the spiral pushing rod is arranged in the connecting through hole and is movably connected with the connecting through hole in a damping mode, and a sealing ring II is arranged at the connecting position of the spiral pushing rod and the connecting through hole. When the spiral pushing rod rotates for feeding, the spiral pushing rod and the connecting through hole can perform damping rotation; when the spiral pushing rod is used for injecting and pushing materials to the cavity, the spiral pushing rod can slide in a damping mode with the connecting through hole. The sealing ring II is arranged at the joint of the spiral pushing rod and the connecting through hole, so that the sealing performance of the injection seat cavity I is improved, and the condition of liquid leakage is prevented.

Preferably, be equipped with on the carousel with pivot assorted carousel through-hole, the carousel passes through the carousel through-hole cover in the pivot, be equipped with the axial spout in the pivot, be equipped with on the inside wall of carousel through-hole with axial spout assorted limit slide, the carousel passes through the cooperation of limit slide and axial spout and installs in the pivot and with pivot sliding connection, be fixed with rotating electrical machines on the injection seat, the other end of pivot link up the lateral wall of injection seat cavity two and install on rotating electrical machines. The rotating motor plays a role in driving the rotating shaft to rotate. Through the spacing design of axial spout and spacing slider for can drive the carousel synchronous revolution together at the rotatory in-process of pivot, and under the screw thread effect, reach the carousel and carry out the relative slip purpose in the pivot.

Preferably, the inside of pivot is equipped with the pivot cavity, the pivot cavity is arranged in the one end of pivot and is located the inside of pushing ram spout, be equipped with the side through-hole on the lateral wall of pivot cavity, the locking device include with pivot cavity assorted sliding plate, the sliding plate arrange in the pivot cavity and with pivot cavity sliding connection, be fixed with on the sliding plate with side through-hole assorted spacing locking lever, spacing locking lever arrange in the side through-hole and with side through-hole sliding connection, be equipped with on the lateral wall of pushing ram spout with spacing locking lever assorted spacing locking lever spout. When spacing locking lever locked in the spacing locking lever spout, can be connected pivot and screw propulsion pole, the pivot can drive screw propulsion pole this moment and rotate in step, realizes screw propulsion pole's rotatory pay-off, and through the slip design of spacing locking lever on spacing locking lever spout, can make screw propulsion pole retreat backward along the pivot smoothly under the thrust effect of melt, has guaranteed the normal operating of injection molding machine. When the limiting lock rod is separated from the limiting lock rod sliding groove, the connection between the rotating shaft and the spiral pushing rod can be released, so that the spiral pushing rod is not influenced by the rotation of the rotating shaft and is pushed forward only under the pushing of the rotating disc, molten materials are injected into the cavity, the original double-power structure of the injection molding machine is simplified through the design, the working continuity is improved, and the injection molding efficiency is improved.

Preferably, the sliding plate is made of a magnetic conductive material, an electromagnetic induction coil is arranged inside the rotating shaft and is installed on the outer side of the cavity of the rotating shaft, a pressure power generation device is installed at the end of one end of the rotating shaft and is electrically connected with the electromagnetic induction coil, and the pressure power generation device is electrically connected with the rotating motor. During initial state, the limiting lock rod is in a state of locking into the limiting lock rod sliding groove, the rotating shaft is connected with the spiral pushing rod at the moment, and the spiral pushing rod is driven to rotate and feed through the rotating shaft. When the rotary feeding is finished, the spiral pushing rod retreats to the tail end position, the bottom surface of the pushing rod sliding groove supplies pressure to the pressure power generation device at the end part of the rotating shaft, the pressure power generation device receives the pressure signal and then energizes the electromagnetic induction coil to generate an induction magnetic field, the sliding plate and the limiting locking rod on the sliding plate move under the action of the induction magnetic field, the limiting locking rod is separated from the limiting locking rod sliding groove, the rotating shaft is disconnected with the spiral pushing rod, meanwhile, a reverse signal is sent to the rotating motor, the rotating disc drives the spiral pushing rod to advance under the reverse action of the rotating motor, molten materials are injected into the cavity, the structure is simple, the control is convenient, the working continuity is improved, and the injection molding efficiency is improved.

Preferably, the pressure power generation device comprises piezoelectric ceramics and a circuit board, the piezoelectric ceramics are fixed on the end face of one end of the rotating shaft, a rectifier, a single chip microcomputer and a transmitter are arranged on the circuit board, the piezoelectric ceramics are electrically connected with the rectifier, the rectifier is electrically connected with the electromagnetic induction coil, the piezoelectric ceramics are electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the transmitter, a receiver matched with the transmitter is arranged on the rotating motor, and the single chip microcomputer is electrically connected with the rotating motor through the matching of the transmitter and the receiver. The piezoelectric ceramic can generate positive and negative charges under the pressure action of the bottom surface of the push rod sliding groove, current is formed after rectification through the rectifier and is introduced into the electromagnetic induction coil to generate an induction magnetic field, and the purposes of controlling the sliding plate and the limiting lock rod on the sliding plate to move and separating the limiting lock rod from the limiting lock rod sliding groove are achieved. Meanwhile, after the single chip microcomputer detects a pressure signal on the piezoelectric ceramic, a reverse signal is sent to a receiver on the rotating motor through the sender to control the rotating motor to reversely rotate, so that the rotary table drives the spiral pushing rod to forwards push under the reverse action of the rotating motor, molten materials are injected into the cavity, the structure is simple, the control is convenient, the automation degree is high, the working continuity is improved, and the injection molding efficiency is improved.

Preferably, a third return spring is arranged in the rotating shaft cavity, one end of the third return spring is fixed on the sliding plate, the other end of the third return spring is fixed on the inner side wall of the rotating shaft cavity, damping liquid is filled in the rotating shaft cavity, a plurality of damping liquid through holes are formed in the sliding plate, and a third sealing ring is arranged at the joint of the limiting locking rod and the side through hole. In the initial state, the limit lock rod on the sliding plate is locked in the limit lock rod sliding groove under the action of the elastic force of the return spring III. The current generated by the piezoelectric ceramic is an instant current, so the generated magnetic field is an instant magnetic field, the electromagnetic force generated on the sliding plate is an instant force, and the sliding plate can automatically reset under the action of the third return spring after the electromagnetic force disappears. Through the design that has increased damping liquid, at the in-process that resets of sliding plate, damping liquid can pass the damping liquid through-hole on the sliding plate, through the friction between pore wall and damping liquid and the internal friction between the damping liquid molecule, can form the damping force to the motion of sliding plate, in order to offset the partial reset force of reset spring three pairs of sliding plates, reduce the velocity of motion of sliding plate at the in-process that resets, reach the purpose that the sliding plate slowly resets, in order to guarantee at the propulsive in-process of spiral propulsion pole forward, spacing locking lever on the sliding plate can not lock in the spacing locking lever spout, the normal operating of injection molding machine has been guaranteed. Through installing sealing ring three in the junction of limit lock pole and side through-hole, improved the leakproofness of pivot cavity, prevent that its condition of weeping from appearing.

The invention has the beneficial effects that: the structure of the injection molding machine is simplified, the working continuity is improved, and the injection molding efficiency is improved; the notch of the exhaust groove can be automatically cleaned and dredged, so that the blockage phenomenon at the notch of the exhaust groove is prevented, the molding quality of an injection molding product is ensured, and the injection molding efficiency is improved; the action is rapid, the response is sensitive, the demolding efficiency of the injection molding machine is improved, and the working continuity is further improved; the sealing performance is good; simple structure, control is convenient, and degree of automation is high.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural diagram of the moving mold and the fixed mold in FIG. 2;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is a schematic view of the injection seat of FIG. 2;

fig. 6 is an enlarged view at B in fig. 5.

In the figure: 1. the injection mold comprises a mold base, 2 parts of a guide rod, 3 parts of a cylinder, 4 parts of a movable mold, 5 parts of a fixed mold, 6 parts of a fixed plate, 7 parts of an injection base, 8 parts of a frame, 9 parts of a guide hole, 10 parts of an injection port, 11 parts of a charging barrel, 12 parts of a feeding port, 13 parts of an injection base cavity I, 14 parts of a spiral pushing rod, 15 parts of a heating layer, 16 parts of an injection head, 17 parts of a discharging port, 18 parts of a sliding column, 19 parts of a fixed top block, 20 parts of an exhaust channel II, 21 parts of a groove through hole, 22 parts of a groove, 23 parts of an outer mold surface, 24 parts of a mold surface I, 25 parts of a feeding channel, 26 parts of an inner mold surface, 27 parts of an exhaust channel, 28 parts of an exhaust channel I, 29 parts of a movable top block, 30 parts of a side sliding groove I, 31 parts of a return spring I, 32 parts of a side sliding block I, 33 parts of an exhaust channel through hole, 34 parts of a side sliding block II, 35 parts of a side sliding groove II, 36. the hydraulic cylinder comprises a dredging block, a 37 sliding rod, a 38 positioning clamping groove, a 39 fixing tube, a 40 positioning clamping block, a 41 return spring II, a 42 connecting through hole, a 43 injection seat cavity II, a 44 rotating disc, a 45 external thread, a 46 internal thread area, a 47 rotating motor, a 48 rotating shaft, a 49 axial sliding groove, a 50 limiting sliding block, a 51 circuit board, a 52 limiting locking bar sliding groove, a 53 limiting locking bar, a 54 side through hole, a 55 electromagnetic induction coil, a 56 rotating shaft cavity, a 57 damping liquid through hole, a 58 sliding plate, a 59 return spring III, a 60 damping liquid, a 61 piezoelectric ceramic, a 62 pushing rod sliding groove, a 63 buckle, a 64 clamping groove and a 65 rotating disc through hole.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1 and 2, an automatic injection molding machine comprises a frame 8, a mold base 1 and an injection base 7 are arranged on the frame 8, the mold base 1 is fixed on the frame 8, a fixed mold 5 and a movable mold 4 are installed on the mold base 1, the fixed mold 5 is fixedly connected with the mold base 1, the movable mold 4 is arranged on the side surface of the fixed mold 5 and is in sliding connection with the mold base 1, and a mold surface I24 and a mold surface II are respectively arranged on the surface of the fixed mold 5 and the surface of the movable mold 4.

As shown in fig. 2 and 3, the first mold surface 24 and the second mold surface are both located on the side surface of the fixed mold 5 opposite to the movable mold 4, the second mold surface is composed of an inner mold surface 26 and an outer mold surface 23, a groove 22 is arranged on the movable mold 4, a movable top block 29 is connected in the groove 22 in a sliding mode, the inner mold surface 26 is located on the surface of the movable top block 29, the outer mold surface 23 is located on the surface of the movable mold 4 and located on the outer side of the inner mold surface 26, an exhaust groove 27 is arranged inside the movable top block 29, the opening of the exhaust groove 27 is located on the inner mold surface 26, the exhaust groove 27 is communicated with the external space, and a notch dredging device is installed inside the exhaust groove 27.

As shown in fig. 2 and 5, the injection seat 7 is mounted on the frame 8 and slidably connected to the frame 8, the fixed mold 5 is located between the injection seat 7 and the movable mold 4, the injection seat 7 is internally provided with a first injection seat cavity 13 and a second injection seat cavity 43, the first injection seat cavity 13 is located between the fixed mold 5 and the second injection seat cavity 43, the first injection seat cavity 13 is internally provided with a spiral push rod 14, the tail end of the spiral push rod 14 penetrates through the first injection seat cavity 13 and is disposed in the second injection seat cavity 43, the second injection seat cavity 43 is internally provided with a rotating shaft 48, the end surface of the tail end of the spiral push rod 14 is provided with a push rod chute 62 matched with the rotating shaft 48, one end of the rotating shaft 48 is disposed in the push rod chute 62 and is movably connected with the push rod chute 62, the rotating shaft 48 is provided with a locking device, the locking device is located inside the push rod chute 62, the other end of the rotating shaft 48 is mounted on the side wall of the second injection seat cavity 43 and is rotatably connected with the same, the rotating shaft 48 is connected with a rotating disc 44 in a sliding mode, an external thread 45 is arranged on the outer side face of the rotating disc 44, an internal thread area 46 matched with the external thread 45 is arranged on the inner side wall of the second injection seat cavity 43, and the rotating disc 44 is in threaded connection with the second injection seat cavity 43 through the matching of the external thread 45 and the internal thread area 46.

As shown in fig. 1 and 2, a fixing plate 6 is arranged on a rack 8, the fixing plate 6 is arranged between a mold base 1 and an injection base 7, the fixing plate 6 is fixedly connected with the mold base 1 through a plurality of guide rods 2, a guide hole 9 matched with the fixed guide rod 2 is arranged on a movable mold 4, the movable mold 4 is arranged on the fixed guide rod 2 through the guide hole 9, a cylinder 3 is arranged on the mold base 1, the movable mold 4 is fixed on the cylinder 3 and is in sliding connection with the fixed guide rod 2 through the cylinder 3, and a fixed mold 5 is fixed on one surface of the fixing plate 6 opposite to the mold base 1.

As shown in fig. 2 and 3, a groove through hole 21 is formed in the bottom surface of the groove 22, a sliding column 18 matched with the groove through hole 21 is connected in the groove through hole 21 in a sliding manner, one end of the sliding column 18 is fixedly connected with a movable top block 29, the other end of the sliding column 18 is arranged outside the movable mold 4, and a fixed top block 19 corresponding to the position of the sliding column 18 is fixed on the mold base 1.

As shown in fig. 2 and 3, the frame 8 is provided with a feed opening 17, the feed opening 17 is located below the movable mold 4 and located in the same vertical plane with the movable mold 4, and the distance from the feed opening 17 to the mold base 1 is equal to the sum of the length of the fixed top block 19, the length of the sliding column 18 and the length of the movable top block 29.

As shown in fig. 3, a first side sliding groove 30 is formed in the inner side wall of the groove through hole 21, a first side sliding block 32 matched with the first side sliding groove 30 is fixed on the sliding column 18, the first side sliding block 32 is arranged in the first side sliding groove 30 and is in sliding connection with the first side sliding groove 30, a first return spring 31 is arranged in the first side sliding groove 30, one end of the first return spring 31 is fixed on the first side sliding block 32, and the other end of the first return spring 31 is fixed at the end of the first side sliding groove 30.

As shown in fig. 3, a clamping groove 64 is arranged on an end face of one end of the sliding column 18, a buckle 63 matched with the clamping groove 64 is arranged on the movable top block 29, the sliding column 18 is in sealed clamping connection with the movable top block 29 through the matching of the clamping groove 64 and the buckle 63, a first exhaust channel 28 is arranged inside the movable top block 29, one end of the first exhaust channel 28 is located on a side wall of the exhaust groove 27, the other end of the first exhaust channel 28 is located on an end face of the buckle 63, a second exhaust channel 20 is arranged inside the sliding column 18, one end of the second exhaust channel 20 is located on a groove wall of the clamping groove 64 and communicated with the first exhaust channel 28, and the other end of the second exhaust channel 20 is located on a side wall of the sliding column 18 and is arranged outside the movable mold 4.

As shown in fig. 3 and 4, an exhaust groove through hole 33 is formed in the bottom surface of the exhaust groove 27, the notch dredging device comprises a fixed pipe 39 arranged inside the exhaust groove through hole 33, the fixed pipe 39 is fixed on the bottom surface of the groove 22 and is slidably connected with the exhaust groove through hole 33, a dredging block 36 is slidably connected inside the exhaust groove 27, a sliding rod 37 matched with the inside of the fixed pipe 39 is fixed on the dredging block 36, the sliding rod 37 is arranged inside the fixed pipe 39 and is slidably connected with the fixed pipe 39, a positioning clamping groove 38 is formed in the inner side wall of the fixed pipe 39, and a positioning clamping block 40 matched with the positioning clamping groove 38 is fixed on the sliding rod 37.

As shown in fig. 3 and 4, a second side sliding groove 35 is arranged on the side wall of the exhaust groove 27, a second side sliding block 34 matched with the second side sliding groove 35 is fixed on the dredging block 36, the second side sliding block 34 is arranged in the second side sliding groove 35 and is in sliding connection with the second side sliding groove 35, the distance from the end part of the dredging block 36 close to the opening end of the exhaust groove 27 to the second side sliding block 34 is greater than the distance from the end part of the second side sliding groove 35 close to the opening end of the exhaust groove 27, a second return spring 41 is arranged inside the fixed pipe 39, one end of the second return spring 41 is fixed on the bottom surface of the groove 22, and the other end of the second return spring 41 fixes the end part of the sliding rod 37.

As shown in fig. 2 and 3, a feeding channel 25 is arranged inside the fixed die 5, one end of the feeding channel 25 is positioned on the first die surface 24, the other end of the feeding channel 25 is positioned on the contact surface of the fixed die 5 and the fixed plate 6, and the fixed plate 6 is provided with an injection port 10 matched with the other end of the feeding channel 25.

As shown in fig. 2, an injection head 16 matched with the injection port 10 is installed on the injection seat 7, the injection head 16 is communicated with a first injection seat cavity 13, a feed port 12 is formed in the side wall of the first injection seat cavity 13, a feed barrel 11 is fixed at the feed port 12, a first sealing ring is installed at the joint of the feed barrel 11 and the feed port 12, the feed barrel 11 is communicated with the first injection seat cavity 13, a heating layer 15 is installed on the injection seat 7, the heating layer 15 is sleeved outside the first injection seat cavity 13, and the heating layer 15 is located between the feed port 12 and the injection head 16.

As shown in fig. 2 and 5, a connecting through hole 42 matched with the screw propulsion rod 14 is arranged between the first injection seat cavity 13 and the second injection seat cavity 43, the screw propulsion rod 14 is arranged in the connecting through hole 42 and is in damping movable connection with the connecting through hole 42, and a second sealing ring is arranged at the connecting position of the screw propulsion rod 14 and the connecting through hole 42.

As shown in fig. 5 and 6, a turntable through hole 65 matched with the rotating shaft 48 is arranged on the turntable 44, the turntable 44 is sleeved on the rotating shaft 48 through the turntable through hole 65, an axial sliding groove 49 is arranged on the rotating shaft 48, a limit slider 50 matched with the axial sliding groove 49 is arranged on the inner side wall of the turntable through hole 65, the turntable 44 is arranged on the rotating shaft 48 through the matching of the limit slider 50 and the axial sliding groove 49 and is in sliding connection with the rotating shaft 48, a rotating motor 47 is fixed on the injection seat 7, and the other end of the rotating shaft 48 penetrates through the side wall of the injection seat cavity two 43 and is arranged on the rotating motor 47.

As shown in fig. 5 and 6, a rotating shaft cavity 56 is arranged inside the rotating shaft 48, the rotating shaft cavity 56 is arranged at one end of the rotating shaft 48 and is located inside the push rod sliding groove 62, a side through hole 54 is arranged on a side wall of the rotating shaft cavity 56, the locking device comprises a sliding plate 58 matched with the rotating shaft cavity 56, the sliding plate 58 is arranged in the rotating shaft cavity 56 and is in sliding connection with the rotating shaft cavity 56, a limit lock rod 53 matched with the side through hole 54 is fixed on the sliding plate 58, the limit lock rod 53 is arranged in the side through hole 54 and is in sliding connection with the side through hole 54, and a limit lock rod sliding groove 52 matched with the limit lock rod 53 is arranged on a side wall of the push rod sliding groove 62.

As shown in fig. 5 and 6, the sliding plate 58 is made of a magnetic conductive material, an electromagnetic induction coil 55 is disposed inside the rotating shaft 48, the electromagnetic induction coil 55 is installed outside the rotating shaft cavity 56, a pressure power generation device is installed at an end of one end of the rotating shaft 48, the pressure power generation device is electrically connected to the electromagnetic induction coil 55, and the pressure power generation device is electrically connected to the rotating electrical machine 47.

As shown in fig. 5 and 6, the pressure power generation device includes a piezoelectric ceramic 61 and a circuit board 51, the piezoelectric ceramic 61 is fixed on an end face of one end of the rotating shaft 48, the circuit board 51 is provided with a rectifier, a single chip microcomputer and a transmitter, the piezoelectric ceramic 61 is electrically connected with the rectifier, the rectifier is electrically connected with the electromagnetic induction coil 55, the piezoelectric ceramic 61 is electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the transmitter, the rotating motor 47 is provided with a receiver matched with the transmitter, and the single chip microcomputer is electrically connected with the rotating motor 47 through the matching of the transmitter and the receiver.

As shown in fig. 5 and 6, a third return spring 59 is arranged inside the rotating shaft cavity 56, one end of the third return spring 59 is fixed on the sliding plate 58, the other end of the third return spring 59 is fixed on the inner side wall of the rotating shaft cavity 56, damping fluid 60 is filled inside the rotating shaft cavity 56, a plurality of damping fluid through holes 57 are formed in the sliding plate 58, and a third sealing ring is arranged at the connection position of the limiting lock rod 53 and the side through hole 54.

The specific working process is as follows:

firstly, the cylinder 3 is controlled to work, the movable die 4 is pushed to approach the fixed die 5 along the guide rod 2, and die assembly is carried out.

Secondly, after the mold is closed, the injection seat 7 is controlled to move towards the direction of the fixed plate 6 on the frame 8, the injection head 16 on the injection seat is inserted into the injection port 10, and then the worker adds the injection molding raw material into the barrel 11.

Thirdly, after the injection molding raw material is added, the rotary motor 47 is controlled to work to drive the rotating shaft 48 to rotate forwards, so that the spiral pushing rod 14 is driven to rotate synchronously (at the moment, the limit locking rod 53 is in an initial state locked in the limit locking rod sliding groove 52), the spiral pushing rod 14 is rotated and fed in the first injection seat cavity 13 (the injection molding raw material is heated into a molten state by the heating layer 15 in the rotating process of the spiral pushing rod 14), and the molten material is fed to the injection head 16. At this time, the screw pushing rod 14 moves backward along the rotation shaft 48 by the pushing force of the melt, and the rotation disk 44 moves backward on the rotation shaft 48 by the screw thread.

Fourthly, when the rotary feeding is finished, the spiral pushing rod 14 and the rotary disc 44 are both retreated to the tail end position, at the moment, the bottom surface of the pushing rod sliding groove 62 is contacted with the piezoelectric ceramic 61 at the end part of the rotating shaft 48, a pressure is applied to the piezoelectric ceramic 61, the piezoelectric ceramic 61 generates positive and negative charges under the action of the pressure, instantaneous current is formed after rectification through the rectifier and is introduced into the electromagnetic induction coil 55, an instantaneous induction magnetic field is generated, the sliding plate 58 and the limiting lock rod 53 on the sliding plate move in the rotating shaft cavity 56 under the action of the magnetic field force, and the limiting lock rod 53 is driven to be separated from the limiting lock rod sliding groove 52, so that the connection state of the rotating shaft 48 and the spiral pushing rod 14 is released. Meanwhile, after the single chip microcomputer detects a pressure signal on the piezoelectric ceramic 61, the single chip microcomputer sends a reverse signal to a receiver on the rotary motor 47 through a transmitter, controls the rotary motor 47 to reverse, so that the turntable 44 moves forwards under the action of the screw thread and pushes against the spiral push rod 14 to drive the rotary motor to move forwards together, molten material is injected into the feed channel 25 (when the electromagnetic force disappears, the sliding plate 58 automatically resets under the action of the third return spring 59. in the resetting process of the sliding plate 58, the damping liquid 60 in the rotating shaft cavity 56 passes through the damping liquid through hole 57 on the sliding plate 58, and forms a damping force on the movement of the sliding plate 58 through the friction between the hole wall and the damping liquid 60 and the internal friction between the damping liquid molecules, so as to counteract a part of the return force of the third return spring 59 on the sliding plate 58, reduce the movement speed of the sliding plate 58 in the resetting process, and achieve the purpose of slow resetting of the sliding plate 58, to ensure that the limit lock lever 53 on the slide plate 58 does not lock into the limit lock lever slide slot 52 during forward advancement of the screw-propelling rod 14).

And fifthly, the molten material flows into a cavity formed by the second model surface (the inner model surface 26 and the outer model surface 23) and the first model surface 24 along the feeding channel 25 under the propelling action of the spiral propelling rod 14, and is solidified and shaped after pressure maintaining to form the injection molding product.

Sixthly, after the injection molding product is molded, the cylinder 3 resets, the movable die 4 is pushed to be far away from the fixed die 5 along the guide rod 2, and the die sinking is carried out. When the sliding column 18 on the movable mold 4 moves to the position of the fixed ejector block 19, the fixed ejector block 19 will abut against the sliding column 18 and the movable ejector block 29 thereon, so as to automatically eject the injection molded product out of the groove 22 and automatically fall into the discharging opening 17 (in the process that the movable ejector block 29 ejects the injection molded product, the sliding rod 37 also slides in the fixed pipe 39 and is pulled out of the fixed pipe 39, when the movable ejector block 29 just ejects the injection molded product out of the groove 22, the positioning fixture block 40 on the sliding rod 37 also just locks in the positioning fixture groove 38 on the inner side wall of the fixed pipe 39, and at this time, the fixed pipe 39, the sliding rod 37 and the dredging block 36 thereon are all in a relatively fixed state).

And seventhly, after the injection molded part product is ejected out, the air cylinder 3 works again, the movable die 4 is continuously pushed to approach the fixed die 5 along the guide rod 2, the next die assembly is carried out, and the sliding column 18 and the movable ejector block 29 are reset under the action of the first return spring 31. Because the slide bar 37 and the dredging block 36 are clamped and fixed, the exhaust groove 27 moves relative to the dredging block 36 at the moment, when the notch of the exhaust groove 37 moves to the position of the dredging block 36, the residue at the edge of the notch is ejected out by the dredging block 36, and the purpose of cleaning the notch is achieved. With the continuous movement of the exhaust slot 27, when the end wall of the second side slot 35 contacts the second side slider 34, a pressure is applied to the second side slider 34, and at this time, the positioning latch 40 on the sliding rod 37 is disengaged from the positioning latch 38 on the fixed tube 39 under the action of the pressure, so that the relative fixing state of the sliding rod 37 and the fixed tube 39 is released, and finally, the sliding rod 37 also completes automatic reset under the action of the second return spring 41.

Claims

1. The utility model provides an automatic change injection molding machine, characterized by, includes frame (8), be equipped with mould seat (1) and injection seat (7) on frame (8), mould seat (1) is fixed in frame (8), install cover half (5) and movable mould (4) on mould seat (1), cover half (5) and mould seat (1) fixed connection, the side of cover half (5) and with mould seat (1) sliding connection are arranged in movable mould (4), the surface of cover half (5) and the surface of movable mould (4) are equipped with mould profile one (24) and model profile two respectively, mould profile one (24) and mould profile two all are located cover half (5) and movable mould (4) relative side, mould profile two comprises interior mould profile (26) and outer mould profile (23), be equipped with recess (22) on movable mould (4), sliding connection has activity kicking block (29) in recess (22), the utility model discloses an injection mould, including centre form profile (26), movable ejector pad (29), outer mold profile (23) place in the surface of movable mould (4) and be located the outside of centre form profile (26), the inside of activity ejector pad (29) is equipped with exhaust duct (27), the opening part of exhaust duct (27) is located centre form profile (26), exhaust duct (27) and external space communicate with each other, the internally mounted of exhaust duct (27) has notch pull throughs, injection seat (7) install in frame (8) and with frame (8) sliding connection, cover half (5) are located between injection seat (7) and movable mould (4), the inside of injection seat (7) is equipped with injection seat cavity one (13) and injection seat cavity two (43), injection seat cavity one (13) is located between cover half (5) and injection seat cavity two (43), install screw propulsion pole (14) in injection seat cavity one (13), the tail end of the spiral pushing rod (14) penetrates through the first injection seat cavity (13) and is arranged in the second injection seat cavity (43), a rotating shaft (48) is arranged in the second injection seat cavity (43), a pushing rod sliding groove (62) matched with the rotating shaft (48) is formed in the end face of the tail end of the spiral pushing rod (14), one end of the rotating shaft (48) is arranged in the pushing rod sliding groove (62) and is movably connected with the pushing rod sliding groove (62), a locking device is installed on the rotating shaft (48), the locking device is located inside the pushing rod sliding groove (62), the other end of the rotating shaft (48) is installed on the side wall of the second injection seat cavity (43) and is rotatably connected with the side wall of the second injection seat cavity (43), a rotating disc (44) is slidably connected to the rotating shaft (48), an external thread (45) is formed in the outer side face of the rotating disc (44), an internal thread area (46) matched with the external thread (45) is formed in the inner side wall of the second injection seat cavity (43), the rotary disc (44) is in threaded connection with the second injection seat cavity (43) through the matching of the external thread (45) and the internal thread area (46).

2. The automatic injection molding machine of claim 1, wherein a fixing plate (6) is arranged on the machine frame (8), the fixing plate (6) is arranged between the mold base (1) and the injection base (7), the fixing plate (6) is fixedly connected with the mold base (1) through a plurality of guide rods (2), a guide hole (9) matched with the fixed guide rod (2) is formed in the movable mold (4), the movable mold (4) is installed on the fixed guide rod (2) through the guide hole (9), the air cylinder (3) is installed on the mold base (1), the movable mold (4) is fixed on the air cylinder (3) and is in sliding connection with the fixed guide rod (2) through the air cylinder (3), and the fixed mold (5) is fixed on one surface of the fixing plate (6) opposite to the mold base (1).

3. The automatic injection molding machine of claim 1, wherein a groove through hole (21) is formed in the bottom surface of the groove (22), a sliding column (18) matched with the groove through hole (21) is connected in the groove through hole (21) in a sliding mode, one end of the sliding column (18) is fixedly connected with the movable top block (29), the other end of the sliding column (18) is arranged outside the movable mold (4), and the fixed top block (19) corresponding to the position of the sliding column (18) is fixed on the mold base (1).

4. An automatic injection molding machine according to claim 3, characterized in that the inner side wall of the groove through hole (21) is provided with a first side sliding groove (30), the sliding column (18) is fixed with a first side sliding block (32) matched with the first side sliding groove (30), the first side sliding block (32) is arranged in the first side sliding groove (30) and is in sliding connection with the first side sliding groove, a first return spring (31) is arranged in the first side sliding groove (30), one end of the first return spring (31) is fixed on the first side sliding block (32), and the other end of the first return spring (31) is fixed at the end part of the first side sliding groove (30).

5. An automatic injection molding machine according to claim 3, wherein a locking groove (64) is provided on an end surface of one end of the slide column (18), a buckle (63) matched with the clamping groove (64) is arranged on the movable top block (29), the sliding column (18) is in sealing clamping connection with the movable top block (29) through the matching of the clamping groove (64) and the buckle (63), a first exhaust channel (28) is arranged inside the movable top block (29), one end of the first exhaust channel (28) is positioned on the side wall of the exhaust groove (27), the other end of the first exhaust channel (28) is positioned on the end surface of the buckle (63), a second exhaust channel (20) is arranged inside the sliding column (18), one end of the second exhaust channel (20) is positioned on the wall of the clamping groove (64) and communicated with the first exhaust channel (28), the other end of the second exhaust channel (20) is positioned on the side wall of the sliding column (18) and is arranged outside the movable mold (4).

6. The automatic injection molding machine of claim 1, wherein an exhaust groove through hole (33) is formed in the bottom surface of the exhaust groove (27), the notch dredging device comprises a fixed pipe (39) arranged inside the exhaust groove through hole (33), the fixed pipe (39) is fixed on the bottom surface of the groove (22) and is in sliding connection with the exhaust groove through hole (33), a dredging block (36) is in sliding connection with the inside of the exhaust groove (27), a sliding rod (37) matched with the inside of the fixed pipe (39) is fixed on the dredging block (36), the sliding rod (37) is arranged inside the fixed pipe (39) and is in sliding connection with the fixed pipe (39), a positioning clamping groove (38) is formed in the inner side wall of the fixed pipe (39), and a positioning clamping block (40) matched with the positioning clamping groove (38) is fixed on the sliding rod (37).

7. An automatic injection molding machine according to claim 6, wherein the side walls of said air discharge duct (27) are provided with second side slide grooves (35), a second side sliding block (34) matched with the second side sliding groove (35) is fixed on the dredging block (36), the second side sliding block (34) is arranged in the second side sliding groove (35) and is in sliding connection with the second side sliding groove (35), the distance from the end part of the dredging block (36) close to the opening end of the exhaust groove (27) to the side sliding block II (34) is greater than the distance from the end part of the side sliding chute II (35) close to the opening end of the exhaust groove (27), a second return spring (41) is arranged in the fixed pipe (39), one end of the second return spring (41) is fixed on the bottom surface of the groove (22), the other end of the second return spring (41) is fixed at the end part of the sliding rod (37).

8. An automatic injection molding machine according to claim 2, characterized in that the fixed mold (5) is provided with a feeding channel (25) inside, one end of the feeding channel (25) is located on the first mold surface (24), the other end of the feeding channel (25) is located on the contact surface of the fixed mold (5) and the fixed plate (6), and the fixed plate (6) is provided with an injection port (10) matched with the other end of the feeding channel (25).

9. The automatic injection molding machine of claim 8, wherein the injection seat (7) is provided with an injection head (16) matched with the injection port (10), the injection head (16) is communicated with a first injection seat cavity (13), a feed port (12) is formed in the side wall of the first injection seat cavity (13), a feed cylinder (11) is fixed at the feed port (12), a first sealing ring is arranged at the joint of the feed cylinder (11) and the feed port (12), the feed cylinder (11) is communicated with the first injection seat cavity (13), a heating layer (15) is arranged on the injection seat (7), the heating layer (15) is sleeved outside the first injection seat cavity (13), and the heating layer (15) is positioned between the feed port (12) and the injection head (16).

10. The automatic injection molding machine of claim 1, wherein a connecting through hole (42) matched with the screw propulsion rod (14) is arranged between the injection seat cavity I (13) and the injection seat cavity II (43), the screw propulsion rod (14) is arranged in the connecting through hole (42) and is movably connected with the connecting through hole (42) in a damping mode, and a sealing ring II is arranged at the connecting position of the screw propulsion rod (14) and the connecting through hole (42).

11. The automatic injection molding machine according to claim 1, wherein a turntable through hole (65) matched with the rotating shaft (48) is formed in the turntable (44), the turntable (44) is sleeved on the rotating shaft (48) through the turntable through hole (65), an axial sliding groove (49) is formed in the rotating shaft (48), a limiting slide block (50) matched with the axial sliding groove (49) is arranged on the inner side wall of the turntable through hole (65), the turntable (44) is installed on the rotating shaft (48) through the matching of the limiting slide block (50) and the axial sliding groove (49) and is in sliding connection with the rotating shaft (48), a rotating motor (47) is fixed on the injection seat (7), and the other end of the rotating shaft (48) penetrates through the side wall of the second injection seat cavity (43) and is installed on the rotating motor (47).

12. An automated injection molding machine according to claim 11, wherein the spindle (48) has a spindle cavity (56) therein, the rotating shaft cavity (56) is arranged at one end of the rotating shaft (48) and is positioned inside the push rod sliding groove (62), the side wall of the rotating shaft cavity (56) is provided with a side through hole (54), the locking device comprises a sliding plate (58) matched with the rotating shaft cavity (56), the sliding plate (58) is arranged in the rotating shaft cavity (56) and is connected with the rotating shaft cavity (56) in a sliding way, a limit lock rod (53) matched with the side through hole (54) is fixed on the sliding plate (58), the limit lock rod (53) is arranged in the side through hole (54) and is in sliding connection with the side through hole (54), and a limit lock rod sliding groove (52) matched with the limit lock rod (53) is arranged on the side wall of the push rod sliding groove (62).

13. The automatic injection molding machine of claim 12, wherein the sliding plate (58) is made of magnetic conductive material, the rotating shaft (48) is internally provided with an electromagnetic induction coil (55), the electromagnetic induction coil (55) is arranged outside the rotating shaft cavity (56), the end part of one end of the rotating shaft (48) is provided with a pressure generating device, the pressure generating device is electrically connected with the electromagnetic induction coil (55), and the pressure generating device is electrically connected with the rotating motor (47).

14. The automatic injection molding machine of claim 13, wherein the pressure generating device comprises a piezoelectric ceramic (61) and a circuit board (51), the piezoelectric ceramic (61) is fixed on the end face of one end of the rotating shaft (48), the circuit board (51) is provided with a rectifier, a single chip microcomputer and a transmitter, the piezoelectric ceramic (61) is electrically connected with the rectifier, the rectifier is electrically connected with the electromagnetic induction coil (55), the piezoelectric ceramic (61) is electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the transmitter, the rotating motor (47) is provided with a receiver matched with the transmitter, and the single chip microcomputer is electrically connected with the rotating motor (47) through the matching of the transmitter and the receiver.

15. The automatic injection molding machine of claim 14, wherein a third return spring (59) is arranged inside the rotating shaft cavity (56), one end of the third return spring (59) is fixed on the sliding plate (58), the other end of the third return spring (59) is fixed on the inner side wall of the rotating shaft cavity (56), damping liquid (60) is filled inside the rotating shaft cavity (56), the sliding plate (58) is provided with a plurality of damping liquid through holes (57), and a third sealing ring is arranged at the joint of the limiting lock rod (53) and the side through hole (54).